• Title, Summary, Keyword: $Pb(Ni,Nb)O_3-Pb(Zr, Ti)O_3$ Columbite

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Sintering and Electric Prooperties of Pb(Zn, Nb)$O_3$-Pb(Ni, Nb))$O_3$-$PbTiO_3$-$PbZrO_3$ System (Pb(Zn, Nb)$O_3$-Pb(Ni, Nb))$O_3$-$PbTiO_3$-$PbZrO_3$계 세라믹스의 소결 및 전기적 특성)

  • 박재성;이기태;남효덕
    • Journal of the Korean Ceramic Society
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    • v.27 no.7
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    • pp.934-942
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    • 1990
  • The quarternary system ceramics 0.5[yPb(Zn1/3Nb2/3)O3-(1-y)Pb(Ni1/3Nb2/3)O3]-0.5[xPbTiO3-(1-x)PbZrO3](PZN-PNN-PT-PZ) was fabricated by the columbite precursor method to obtain a stabilized perovskite structure and by conventional method to evaluate the efficiency of the former methd. Dielectric and piezoelectric properties were investigated and the stability of the perovskite phase was studied as a function of PZN and PT contents and firing temperature. In the samples prepared by the columbite precursor method, the pyrochlore phase, which is detrimental to both the dielectric and piezoelectric properties, was not observed in the absence of PZN, and electric properties were improved even when fabricated at low temperature. By adding PZN, some pyrochlore phase appeared and the morphotropic phase boundary of the samples shifted to more Zr-rich composition. The temperature dependence of piezoelectric constant decreased with the addition of PZN, due to the rising of the Curie point.

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Electrical and mechanical properties of NiO doped Pb(Ni$_{1}$3/Nb$_{2}$3/)O$_3$-PbTiO$_3$-PbZrO$_3$-ceramics (NiO-Doped Pb(Ni$_{1}$3/Nb$_{2}$3/)O$_3$-PbTiO$_3$-PbZr$_3$-O세라믹스의 전기 및 기계적 특성에 관한 연구)

  • 나은상;김윤호;최성철
    • Journal of the Korean Crystal Growth and Crystal Technology
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    • v.10 no.3
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    • pp.245-251
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    • 2000
  • Dielectric properties, piezoelectric properties and mechanical properties of NiO-doped Pb($(Ni_{1/3}Nb_{2/3})O_3-PbTiO_3-PbZrO_3$ ceramics were investigated. Powders, prepared by columbite precursor method, were cold pressed and sintered at temperature ranging from $1100^{\circ}C$ to $1250^{\circ}C$. Dielectric constant and piezoelectric constant increased with amount of NiO up to 1 mol% and then decreased with further addition of NiO. It seems that NiO acts as a sintering aid at the sintering temperatures of $1150^{\circ}C$. When the samples were sintered at temperature above $1200^{\circ}C$, however, both dielectric constant and electromechanical coupling factor decreased and mechanical quality coefficient increased with addition of NiO. Hardness and fracture toughness of PNN-PT-PZ increased with addition of NiO up to 1 mol%, and then decreased slightly with further addition of NiO. These results showed that dielectric properties, piezoelectric properties and mechanical properties of PNN-PT-PZ system seemed to be closely related with microstructural factors such as grain size, bulk density and the amount of second phase.

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Dieletric and Electric properties of PNN-PZN-PZT Ceramic Using Columbite Precursor Method (Columbite Precursor법에 의해 제조된 PNN-PZN-PZT계 세라믹의 유전 및 전기적 특성)

  • Lee, S.H.;Son, M.H.;SaGong, G.
    • Proceedings of the KIEE Conference
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    • pp.1028-1030
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    • 1995
  • In the fields of the optics, precise machine, semiconducting processing, the micro-positioning actuators are required for the control of position in the submicron range. In this study, $Pb(Ni_{1/3}Nb_{2/3})O_3-Pb({Zn}_{1/3}Nb_{2/3})O_3-Pb({Zr}_{1/2}Ti_{1/2})O_3$ ceramics were fabricated by solid state reaction. The structural, dielectric and electric properties were investigated for sintering condition. The specimen sintered at $1,150(^\circ}C)$ for 1hr, had the highest density and dielectric contant. The resistivity, dielectric and density were increased with increasing PZN contents.

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Effects of the Mixing Method and Sintering Temperature on the Characteristics of PZNN-PZT Piezoelectric Ceramic Materials (합성방법과 소결 온도가 PZNN-PZT 압전 세라믹스 소재특성에 미치는 영향)

  • Kim, So Won;Jeong, Yong Jeong;Lee, Hee Chul
    • Journal of Korean Powder Metallurgy Institute
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    • v.25 no.6
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    • pp.487-493
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    • 2018
  • The impact of different mixing methods and sintering temperatures on the microstructure and piezoelectric properties of PZNN-PZT ceramics is investigated. To improve the sinterability and piezoelectric properties of these ceramics, the composition of $0.13Pb((Zn_{0.8}Ni_{0.2})_{1/3}Nb_{2/3})O_3-0.87Pb(Zr_{0.5}Ti_{0.5})O_3$ (PZNN-PZT) containing a Pb-based relaxor component is selected. Two methods are used to create the powder for the PZNN-PZT ceramics. The first involves blending all source powders at once, followed by calcination. The second involves the preferential creation of columbite as a precursor, by reacting NiO with $Nb_2O_5$ powder. Subsequently, PZNN-PZT powder can be prepared by mixing the columbite powder, PbO, and other components, followed by an additional calcination step. All the PZNN-PZT powder samples in this study show a nearly-pure perovskite phase. High-density PZNN-PZT ceramics can be fabricated using powders prepared by a two-step calcination process, with the addition of 0.3 wt% MnO2 at even relatively low sintering temperatures from $800^{\circ}C$ to $1000^{\circ}C$. The grain size of the ceramics at sintering temperatures above $900^{\circ}C$ is increased to approximately $3{\mu}m$. The optimized PZNN-PZT piezoelectric ceramics show a piezoelectric constant ($d_{33}$) of 360 pC/N, an electromechanical coupling factor ($k_p$) of 0.61, and a quality factor ($Q_m$) of 275.

Effect of Pyrochlore Phase on Electric Properties for PNN-PT-PZ Piezoelectric Ceramics (PNN-PT-PZ계 압전세라믹스의 전기적 특성에 미치는 Pyrochlore 상의 영향)

  • 이기태;남효덕
    • Journal of the Korean Ceramic Society
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    • v.31 no.9
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    • pp.1030-1036
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    • 1994
  • The ceramics in the system 0.5[Pb(Ni1/3Nb2/3)O3]-0.5[0.65PbTiO3-0.35PbZrO3] were prepared by conventional solid state reaction method, double calcined method (columbite precursor method) and flux method using NaCl-KCl. Amount of pyrochlore phase for the calcined powders, sintering charateristrics, dielectric and piezoelectric properties were then investigated. Sintering temperature was 1000~120$0^{\circ}C$ and in case of flux method, the amount of flux to oxide was 1 : 1 mole ratio. The dielectric and piezoelectric properties of ceramics prepared by double calcined method and flux method were found to be better than those by conventional method. It was also possible to lower sintering temperature and reduce the amount of pyrochlore phase either by double calcined method or flux method. But with increasing sintering temperature, the difference in characteristrics due to diffrent fabrication method gradually.

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Microstructure and Piezoelectric Properties of PMN-PNN-PZT Ceramics (PMN-PNN-PZT 세라믹스의 미세구조 및 압전 특성)

  • Yoo, Ju-Hyun;Kim, Seung-Won
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.30 no.8
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    • pp.496-500
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    • 2017
  • $Pb(Mn_{1/3}Nb_{2/3})_{0.07}(Ni_{1/3}Nb_{2/3})_{0.10}(Zr_{0.5}Ti_{0.5})_{0.83}O_3$ composition ceramics with high piezoelectric properties were fabricated by the columbite precursor method for ultrasonic generators, and the effects of sintering temperature on microstructure and piezoelectric properties were systematically investigated. It was found that the tetragonality of the ceramics decreased with increase in sintering temperature. Moreover, excellent physical properties such as $d_{33}=447pC/N$, ${\varepsilon}_r=1,843$, $k_p=0.641$, and $Q_m=1,207$ were obtained for an ultrasonic generator when the second calcination temperature and sintering temperature were $720^{\circ}C$ and $920^{\circ}C$, respectively.

Dielectric and Piezoelectric Properties of Low Temperature Sintering PMW-PNN-PZT Substituted with CeMnO3 (CeMnO3가 치환된 저온소결 PMW-PNN-PZT 세라믹스의 유전 및 압전 특성)

  • Kim, Yong-Jin;Yoo, Ju-Hyun
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.28 no.3
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    • pp.160-164
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    • 2015
  • In this study, $(1-x)Pb(Mg_{1/2}W_{1/2})_{0.03}(Ni_{1/3}Nb_{2/3})_{0.09}(Zr_{0.5}Ti_{0.5})_{0.88}O_3+xCeMnO_3$ (x= 0~0.02) ceramics were prepared by Columbite precursor method. The phase structure, ferroelectric and piezoelectric properties were systematically investigated. It was found that PMW-PNN-PZT possessed superior electrical properties due to its composition close to the MPB (morphotropic phase boundary). Coercive electric field of 10.05 [kV/cm] and density of 7.88 [$g/cm^3$] were obtained when the substitution amount of $CeMnO_3$ is x=0.02. In contrast, specimens with x=0.01 showed the mechanical quality factor($Q_m$) of 1,091 and the electromechanical coupling factor($k_p$) of 0.613.